Scan has got the 4830 cheap enough to warrant a look today.
£90 inc vat and delivery buys an HIS 4830 with 512 mb GDDR3. T remind ya all, the 4830 is a slightly cut down 4850, with 640 cores, not the 800 of the 4850, and slightly slower clock speeds
(core is 575 against 625 and ram is 1800 against 1986)
But pound for pound, at £90 that's a nice nice card.